Dentist&#39;s anvil.



A. S. LEVY.

DENTISTS ANVIL.

APPLICATION FILED APR.3. 1915.

1,151,200. Patented Aug. 24, 1915.

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ARTHUR-S. LEVY, or BIRMINGHAM, ABABAMA.

DENTISTS .ANVIL.

Application filed April 3, 1915. sea-a1 m, 18,950.

To all whom it may concern.

Be it known that I, ARTHUR S. LEVY, a citizen of the United States ofAmerica, residing at Birmingham, in the county of efferson and State ofAlabama, have invented certain new and useful Improvements in DentistsAnvils, of which the following is a specification.

My invention relates to an improved anvil for holding, swaging andattaching posts to backings for interchangeable dental facings.

The object of my invention is to design an anvil which is especiallyadapted for attaching a novel type of post forming the subject matter ofmy pending application, Serial No. 17,242, to a backing. I contemplateproviding the anvil with sockets adapted to receive posts for both theanterior and posterior facings and in connection with the anterior postsockets I provide a filler plug which is inserted into the socket behindthe post, and both the post and the filler block are designed to fillthe socket flush with the anvil surface, leaving only the clasp wingsprojecting above the anvil. The object of this arrangement is to presenta smooth fiat surface for the reception of the backing from a centralpoint of which surface project the wings on the inserted post that areadapted to be spread by the lead swage block and made fast to thebacking. By providing 7 this flat surface to receive the backing, the

latter will be made perfectly flat during the swaging operation and noindentations and irregularities in its surface will be produced whichmight interfere with the proper 'cementing of the facing to the backing.

I have illustrated the preferred embodiment of my invention in theaccompanying drawings which form a part of this specification, and inwhich Figure 1 is a perspective view of the anvil with the filler blockremoved. Fig. 2 is a plan view showing a post for anterior facings and afiller block in place. Fig. 3 is a partial sectional view on the line00-00 of Fig. 2. Fig. 4 is a detail view of the filler block. Figs. 5and 6 are side and end views of a post for interior facings; and Fig. 7is a partial sectional view on the line y-y of Fig. 2 showing a post forposterior facings in position.

Similar reference numerals refer to similar parts throughout thedrawings.

According to my present invention I provide an anvil of steel or likehard metal hava plane below the bases of its wing clasp members 4, thebases of which members lie in the planes of the shoulders 5 which areadapted to abut against the backing and space the rounded post membertherefrom. The inner end of the socket 2 is undercut at 6 to receive thereduced end shoulder 7 of the post 3. I provide a filler block adaptedto fit in the socket 2 behind the post and comprising a roundedhead 8and a narrow vertical web 9 which when inserted stands flush with thetop face of the anvil and with the top face of the shoulders 5 of thepost. This filler block is removable endwise from the socket so that theposts can be inserted in place and then the filler block introducedbehind it so as to co-act with the shoulders 5 of the poststoaffordasmooth flat surface for the anvil which will receive the backing10 indicated in Fig. 3, wherein the wings (l are shown as forced throughthe backing and ready to be spread by the swage block. The anvil is alsoprovided with a pair of sockets 11 and 12 which are of similar shapeings. These posts 13 have wings 14L, similar to the posts 3 and haveside members 15, the top surfaces of which lie flush with the top faceof the anvil like the shoulders 5.

, The socket or slot 3 could be of any length and one or more fillerblocks used to fill it out and bring the post to the desired position inthe anvil. My improved anvil makes it possible for the dentist toquickly and easily attach either style of post to the backing and at thesame time to leave the backing in the desired condition for theapplication ofthe solder on the back thereof and the cement on the frontface for holding the facing.

Having thus described my invention, What I claim as new and desire tosecure by Letters Patent, is

1. A dentists anvil having in its upper face an undercut post receivingslot, and means to fill out the slot behind the post flush with theupper face of the anvil.

Specification of Letter's'Iatent. -P tented Aug.- 24, f9 15,

2; In a (lentists anvil, in combination, an

' anvil block having in its upper face an undercut slot extendingsubstantially to its center and conforming in vertical cross section tothe cross section of the post; 'anda filler block conforming in crosssectlonto the block and adapted to fill out the slot be hind the postflush With'the top face of the anvil.

3. A dentists anvil having in its upper face a plurality of spaced postreceiving Gopies of this patent may be obtained for slots, saicl slotsbeing shaped in cross section to bev filled out flush by the posts so astc-leave the post attaching means only projecting above the anvil, and ablock to fill out the slot for anterior facing posts', substantiallyas'descri'be'cl.

Witness; 7

NOMIE WELSH.

five cents each, by add'ressing'the Commissioner of Patents; Washington,D. 0;

